Perhaps you should try some spelling variations:
digital information » digital transformation, fiscal information
information series » information services, informatics series, information service
relations surveys » relations survey, relations series, resolution surveys
social relations » fiscal relations, social pensions
del digital » der digital, does digital, do digital
real social » deal social, retail social, legal social

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (( del digital information series ) OR ( real social relations surveys ))~.
• Adding a wildcard symbol may retrieve word variants: (( del digital information series ) or ( real social relations surveys ))*.